xref: /openbmc/u-boot/drivers/clk/at91/clk-slow.c (revision 8a23fc9c) 
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2016 Atmel Corporation
4  *               Wenyou.Yang <wenyou.yang@atmel.com>
5  */
6 
7 #include <common.h>
8 #include <clk-uclass.h>
9 #include <dm.h>
10 
11 static int at91_slow_clk_enable(struct clk *clk)
12 {
13 	return 0;
14 }
15 
16 static ulong at91_slow_clk_get_rate(struct clk *clk)
17 {
18 	return CONFIG_SYS_AT91_SLOW_CLOCK;
19 }
20 
21 static struct clk_ops at91_slow_clk_ops = {
22 	.enable = at91_slow_clk_enable,
23 	.get_rate = at91_slow_clk_get_rate,
24 };
25 
26 static const struct udevice_id at91_slow_clk_match[] = {
27 	{ .compatible = "atmel,at91sam9x5-clk-slow" },
28 	{}
29 };
30 
31 U_BOOT_DRIVER(at91_slow_clk) = {
32 	.name = "at91-slow-clk",
33 	.id = UCLASS_CLK,
34 	.of_match = at91_slow_clk_match,
35 	.ops = &at91_slow_clk_ops,
36 };
37